Memory Game The Endocrine SystemOnline version Review the organs of the endocrine system and their functions. by Kathy Dilliplane Adrenal Glands Helps the immune system recognize and fight pathogens Ovaries Regulates blood sugar levels Pituitary The body's "Master Gland" that controls the other endocrine organs. Regulates growth and metabolism Pineal Gland Thymus Regulates the female reproductive system Produces melatonin to regulate sleep cycles Regulates calcium levels in the blood. Testes Pancreas Increase heart rate during a "Fight or Flight" response Parathyroid Glands Thyroid Regulate the male reproductive system